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Windows 7: PC turns on itself and the monitor does not show anything.

09 Sep 2013   #1
The Risky

Windows 7 64x
 
 
PC turns on itself and the monitor does not show anything.

Hi!Bit of a problem
I decided to put my 3 yr. old PC into use again, its been standing in the corner for 2 years now.
So the problem.
When i plug the power cable in, the PC turns itself on, it doesn't need me to press the power button, secondly, when its on, the monitor doesn't do anything it looks as if its shut down and nothing comes up.

Any ideas?


My System SpecsSystem Spec
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09 Sep 2013   #2
ICIT2LOL

Desk1 7 Home Prem / Desk2 10 Pro / Main lap Asus ROG 10 Pro 2 laptop Toshiba 7 Pro Asus P2520 7 & 10
 
 

Risky mate are you sure the monitor actually switches on - obvious and not trying to be funny but have done it myself in the past. Plus / or try another monitor if possible. The machine switch itself on stuff may be just due to crud build up inside.

Being careful have a look inside and do a clean out and unplug and reseat all the plugs, cards, RAM sticks etc etc but make sure you ground yourself first and during this operation.
My System SpecsSystem Spec
10 Sep 2013   #3
Boozad

W7 Pro x64 SP1 | W10 Pro IP x64 | W8.1 Pro x64 VM | Linux Mint VM
 
 

Turn the PSU off on the PC before plugging the mains cable in, then turn it back on and see if it starts up on its own. Does the motherboard beep when it turns on?
My System SpecsSystem Spec
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10 Sep 2013   #4
ICIT2LOL

Desk1 7 Home Prem / Desk2 10 Pro / Main lap Asus ROG 10 Pro 2 laptop Toshiba 7 Pro Asus P2520 7 & 10
 
 

Yep as Boozad says mate if need be you might have to test the PSU. As a matter of intersy how old is it??

My other thought now is that the power on switch is stuck down perhaps. Now with the power unplugged try pushing it on and off a few times and see if it "clicks" those small switches usually have an impregnated rubber base contacts and just could be sticky from lack of use and / or air humidity.
My System SpecsSystem Spec
12 Sep 2013   #5
The Risky

Windows 7 64x
 
 

2 notes i forgot to add

1. there is no graphics card, to plug the monitor in, you'd have to plug it in to the motherboard input.

2. as you mentioned. "Turn the PSU off on the PC before plugging the mains cable in, then turn it back on and see if it starts up on its own. Does the motherboard beep when it turns on?"
i always do that, i turn the PSU off then plug the cable in and then turn it back on again.And no, it doesn't do a beeping sound.
And you know when you hold down the power button for some seconds it turns off the computer instantly?Well, it doesnt do that, a fan stops working and that's it, you'd have to power off the PSU unit manually in order to turn it off.

one last thing about the computer, its 3 -4 years old and bought by elderly people, it was used for around a year(max), and during that time, it was turned on for 2 - 3 times a week for 2 hours.It was running Vista when we got it and its been sitting in the corner for 2-3 years.
My System SpecsSystem Spec
12 Sep 2013   #6
Boozad

W7 Pro x64 SP1 | W10 Pro IP x64 | W8.1 Pro x64 VM | Linux Mint VM
 
 

If there's no beep there's a fault with the motherboard, it's most likely dead.
My System SpecsSystem Spec
13 Sep 2013   #7
ICIT2LOL

Desk1 7 Home Prem / Desk2 10 Pro / Main lap Asus ROG 10 Pro 2 laptop Toshiba 7 Pro Asus P2520 7 & 10
 
 

Quote   Quote: Originally Posted by Boozad View Post
If there's no beep there's a fault with the motherboard, it's most likely dead.
Actually Boozad if that is the case I would be suspecting the RAM and doing a memtest.

RAM - Test with Memtest86+
My System SpecsSystem Spec
13 Sep 2013   #8
Boozad

W7 Pro x64 SP1 | W10 Pro IP x64 | W8.1 Pro x64 VM | Linux Mint VM
 
 

Never any harm in running a Memtest mate
My System SpecsSystem Spec
13 Sep 2013   #9
ICIT2LOL

Desk1 7 Home Prem / Desk2 10 Pro / Main lap Asus ROG 10 Pro 2 laptop Toshiba 7 Pro Asus P2520 7 & 10
 
 

Quote   Quote: Originally Posted by Boozad View Post
Never any harm in running a Memtest mate
Yep the no beep is a bit of a concern eh?
My System SpecsSystem Spec
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 PC turns on itself and the monitor does not show anything.




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